Both primary and secondary crushers are used in a variety of real-world applications. In mining, primary crushers are used to break down large rocks and stones into smaller particles for further processing. Secondary crushers are used to further refine these particles into the desired size and shape.
Primary crusher is the workhorse that takes blast feed sizes and turns them into smaller sizes that are manageable for other site components—the belts, the screens, and eventually any secondary crushers—on the road to a finished product.
The primary reduction of coal from open pit or underground sources to a transportable and marketable product size, as well as further processing by cleaning plants, can be accomplished with a variety of crusher types. Here's how to choose the best one for your coal application.
Whether it is primary, secondary or tertiary crushing, dump fed or metered, our sturdy, versatile Sizers have been expertly designed to handle many different materials and throughput capacities. Not only are Sizers insensitive to soft, wet and sticky material, but they can also process hard, abrasive rock either separately or combined.
Secondary crushing, as you can imagine, is the second stage of material processing following its initial reduction. At this stage, material will flow through perhaps a second impactor or even a cone crusher, which is …
Large surface coal mines rely on primary crushers to provide a consistent product. Unlike their bituminous counterparts that screen and wash coal, the mines extracting subbituminous coal and lignite are only looking to reduce the size of Run of Mine (RoM) coal, and they are moving extremely high volumes.
There are several types of primary crushers, including: Gyratory Crushers. Jaw Crushers. Hammermills. Horizontal Shaft Impact Crushers. Sizers. Roll Crushers. Cone Crushers. Feeder-Breakers. Gyratory Crushers are an excellent choice for a primary crusher, as they can handle very hard and abrasive material.
1. Jaw crusher. The jaw crushers are popular primary crushers for coal. They are often used in mines and quarries where large amounts of coal are mined. The working principle of the jaw crusher is to use compression force to compress coal between a fixed jaw and a movable jaw for coarse crushing.
The primary coal crushers may be of different types such as: (1) coal jaw, (2) coal hammer, and (3) ring granulator. Secondary coal crusher: Used when the coal coming from the supplier is large enough to be handled by a single crusher. The primary crusher converts the feed size to one that is acceptable to the secondary crusher.
The secondary crusher has a size reduction ratio ranging from 3:1 to 5:1. The secondary crusher can be a cone crusher, impact crusher, or gyratory crusher, depending on the hardness, abrasiveness, and size of the materials. The cone crusher is the most common type of secondary crusher used in mining and quarrying operations.